Electric time-switch.



No. 733,869. PATENTED JULY 14, 1903.

I. 3. 3 B. F. OALLENDER. ELECTRIC TIME SWITCH.

APPLICATION FILED FEB. 28, 1901.

N0 MODEL.

UNITED STATES Iatented July 14, 1903.

PATENT OFFICE.

IRA s. CALLENDER AND EDWIN F. OALLENDER, or GALESBURG, ILLINOIS;

ELECTRIC TI ME-SWITCH.

SPECIFICATION forming part of Letters Patent No. 733,369, dated July 14, 1903.

Application filed February 23, 1901. Serial No. 49,352. (No model;

T0 at whom it may 0072007 77,.-

Be it known that we, IRASOALLENDER and EDWIN F. CALLENDER, citizens of the United States, residing at Galesburg, in the countyof Knox and State of Illinois, have invented certain new and useful Improvements in Time Cut-Outs for Electric Circuits; and we do hereby declare the following to be a full,clear, and exact description of the invention.

Our invention relates to improvements in automatically-operated switches for controlling electric circuits, particularly those ineluding electric lamps used for display and advertising purposes, which lamps are usually kept burning in stores and other places after business hours, the object of the invention being to automatically cut out lights left burning for such purposes ata predetermined time, thus avoiding the annoyance, expense, and possible neglect of personal service for such work.

We shall now describe our invention, so that others skilled in the art may manufacture and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a rear side view of an alarmclock provided with our improved switch-operating mechanism. Fig. 2 is a top plan view of the switch and its operating mechanism. Fig. 3 is a detached view of the trigger and its operating-rod.

In the drawings, 2 represents an ordinary alarm-clock mounted on a base 3 by supports 4 and having the usual time winding and setting shafts 5 and 6 and the usual alarm setting and winding spindles 7 and 8, respectively. Mounted fixedly on the alarm-winding spindle or arbor 8 is an arm 9. Pivoted, by means of a bolt 10, to the outer end of the arm 9 is a rod 11, which rod 11 has at its lower end a longitudinal slot 12, into which projects one extremity 13 of a trigger 14. The trigger 14 is pivoted at its other end, as at 15, to a support 16, secured to the switchbase 17. At its pivotal end the trigger 14 is bent at an angle, so as to form a nib 18 for engaging a hook 19 on the spring 20 of the switch-lever. The switch is of the usual double-pole construction, comprising the base 17, binding-posts 21 22, knife-blades 23 24, and handle 25. The free ends of the knife-blades 23 24 are insulated from each other by the insulating-piece 26, which insulating-piece also insulates the clock from the switch. Secured at one end to the switch-base 17 is the spring 20, which spring is fastened at its other end to the insulating-piece 26 and to the handle 25, which is also connected to the insulatingp'ieee. The tendency of the spring 20 normally is to hold the switch-lever in a raised position unless the samebe detained in a lowered position by the trigger 14.

The operation is as follows: The alarm is set in the ordinary manner by the alarm-setting shaft 7 at the hour at which it is desired that the lamp or lamps in circuit with the switch shall be extinguished. Then the alarmwinding arbor 8 is turned by means of the arm 9, which movement takes the rod 11 to its lowermost position, the end of the rod 11, by reason of the slot 12 therein, sliding on the trigger end 13. Then, by means of the switch-handle 25, the blades 23 and 24 of the switch are brought down into the jaws of the binding-posts 22, closing the circuit. This movement of the handle brings the hooked end of the spring 20 against the nib 18 of the trigger 14, pushing the nib aside until the hook 19 has passed below the lower edge of the nib, when the nib by reason of the construction of the trigger will drop over the hook 19 and hold the switch-blades in their lowered position in the jaws of the bindingposts until by the upward movement of the outer end 13 of the trigger, caused by the going off of the alarm and the pull of the rod 11 on the trigger end 13, the nib l8 and hook 19 are disengaged, when the spring will pull the blades out of the jaws of the bindingposts and break the circuit, causing theextinguishment of the lights.

It will be understood that we do not wish to limit ourselves to the particular form of trigger or to its particular connection with the clock-alarm mechanism, since within the scope of our invention these and other parts of the device may be variously modified. For example, instead of having a slot in the lower end of the rod 11 and the extremity 13 of the trigger 14 projecting thereinto, so as to constitute a sliding connection between the rod 11 and the trigger, the trigger and the rod 11 may be pivotally connected at this point and ICO the sliding or other suitable connection may be made between the top of the rod 11 and the arm 9, or the rod 11 may project through a hole in the end 13 of the trigger and have a small nut or other stop at its lower end, or the arm 9 may be connected to the trigger 14: by a small chain or strip of flexible material. It will also be understood that the spring may be otherwise connected to the switch-lever and that other forms of spring may be used and that the trigger 14 need not necessarily engage with a portion of the spring, but may engage with some other portion of the switch mechanism. These and other modifications are included within the broad claims of this patent.

We claim- 1. The combination, with the alarm-winding arbor of an alarm-clock, of a trigger for holding a spring electric switch in a closed position, an arm transversely and fixedly connected to said arbor, and a rod connected to said arm and to said trigger.

2. The combination, with the alarm-winding arbor of an alarm-clock, of a trigger for holding a spring electric switch in a closed position, an arm transversely and fixedly connected to said arbor, and a rod pivotally connected to said arm and slidably connected to said trigger.

3. The combination, with the alarm-winding arbor of an alarm-clock, of a trigger for holding a spring electric switch in a closed position, an arm mounted transversely on said arbor, and a rod connected to said arm and to said trigger.

4. In combination, the alarm-Winding arbor of an alarm-clock, a spring electric switch hav-' ing a hook, a triggerhaving a nib at one end and adapted to engage with said hook so as to hold the switch in a closed position, and mechanism connected directly to said trigger and to said arbor whereby when the alarm goes off said trigger is released from engagement with said springswitch and the switch is opened.

5. In combination,the alarm-winding arbor of an alarm-clock, a spring electric switch having a hook, a trigger having a nib portion at one end adapted to engage with said hook so as to hold the switch in a closed position, an arm mounted transversely on said arbor, and a rod connected to said arm and to said trigger.

In testimony whereof we affix our sigma-- tures in presence of two witnesses.

IRA S. OALLENDER. EDWIN F. OALLENDER. WVitnesses:

C. M. ROADSTRUM, J. F. DERBY. 

